diff --git a/layouts/fastly/helix.vcl b/layouts/fastly/helix.vcl
index fa70cf74..b3cccd00 100644
--- a/layouts/fastly/helix.vcl
+++ b/layouts/fastly/helix.vcl
@@ -550,7 +550,7 @@ sub hlx_fetch_static {
 
 sub hlx_deliver_static {
   set resp.http.X-Static-Trace = req.http.X-Trace + "; hlx_deliver_static";
-  set resp.http.X-Static-Trace = set resp.http.X-Static-Trace + "[type=" + req.http.X-Request-Type + ", status=" + resp.status + "]";
+  set resp.http.X-Static-Trace = resp.http.X-Static-Trace + "[type=" + req.http.X-Request-Type + ", status=" + resp.status + "]";
   if (req.http.X-Request-Type == "Static-ESI" && resp.status == 200) {
     set resp.http.X-Trace = resp.http.X-Trace + "(esi)";
     # Get the ETag response header and use it to construct a stable URL